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Mr X wrote:
The style is...
*--------------------------------------------------*
*.xtable, .xtable TD, .xtable TH
{
background-color:black;
color:white;
font-family:arial;
}*
*-------------------------------------------------*
(the above style is workinh OK), but the following script gets the error
"document.class es.xtable" is null or not an object.
*---------------------------------------------------*
*function testerx()
{
document.classe s.xtable.all.co lor='Yellow'
}*
*--------------------------------------------------*
You are using fantasy syntax and IE's error message is misleading
one more time (see <http://jibbering.com/faq/>). There is no such
property like document.classe s, so this reference evaluates to
`undefined' and the `undefined' literal value has indeed no `xtable'
property as it has no properties at all.
Instead, CSS selectors defined in a stylesheet are part of the
document.styleS heets[...].cssRules collection in the W3C DOM, where "..."
refers to the zero-based index of the stylesheet. The IE DOM implements
this as document.styleS heets[...].rules. Provided that the stylesheet you
posted is the first one that applies to the document and the selector you
posted is the first one in that stylesheet, you can access its "color"
property's value with
document.styleS heets[0].cssRules[0].style.color = "yellow";
for UAs standards compliant in this regard like Mozilla
document.styleS heets[0].rules[0].style.color = "yellow";
for IE. Be sure to check for DOM support prior to access:
function testerx() // identifier should be more descriptive!
{
var s, r;
if (typeof document != "undefined"
&& typeof document.styleS heets != "undefined"
&& (s = document.styleS heets)
&& typeof s.length != "undefined"
&& s.length > 0)
{
if (typeof s[0].cssRules != "undefined" ) // standards compliant
{
r = s[0].cssRules;
}
else (typeof s[0].rules != "undefined" ) // IE
{
r = s[0].rules;
}
if (r
&& typeof r.length != "undefined"
&& r.length > 0
&& typeof r[0].style != "undefined"
&& (s = r[0].style)
&& typeof s.color != "undefined" )
{
s.color = "yellow";
}
}
}
See
<http://pointedears.de. vu/scripts/test/whatami>
for details.
HTH
PointedEars
